Smooth pipe fitting



FIG. 1 is a top perspective view of my new design smooth pipe fitting;

FIG. 2 is a full front view;

FIG. 3 is a full left end view;

FIG. 4 is a full back view;

FIG. 5 is a full right end view;

FIG. 6 is a full top view; and,

FIG. 7 is a cross sectional view through line 7-7 of FIG. 2. 

CLAIM The ornamental design for a smooth pipe fitting, as shown and described. 